BANGUI, April 27 (Reuters) - At least 22 people, including 15 local chiefs and three members of staff of the medical charity Medecins Sans Frontieres, were killed in an attack on a town in the Central African Republic, officials said on Sunday.

The attack on Saturday was in Nanga Boguila, about 450 km (280 miles) north of the capital Bangui. Some 2,000 French and over 5,000 ...